tramcar trev
all manner of mechanical apparatus...
I posted this here as it crosses several threads but basically its a scratch build technique.
I thinking to myself as i was making more trolley ears that there must be an easier way..... the it dawned on me! Why not etch them out of .25mm brass sheet??? Well when I get my etching thingy sorted I'll have ago at it.
One picture shows the way I've been maiking them with wire and bead soldered up....
The other is my home grown art work shown 5 times full size they will in reality be 8mm wide and 12mm wide for the double. The bit that is used is the black bit and Ive tried to keep the amount of brass to be etched away to a minimum....
The "blade" that the wire is soldered to has a slit in it that mates with a slit on the hanger, to assemble a suitable bead is placed on the bit that sticks up and the other is turned 90 degrees and slid down a dot of lead free solder paste and a touch with an iron and the job is done!!!!
This is a single item only if I can do one then I'll make up a slab of the singles and do a 6x4" sheet of them...... I may have to tweak the design......
Yes I know I can buy these in the US but the postage is absurd and they are lost wax castings with no insulator on them and the little insulator "males" them. The BIG question is though whether such fine work can be etched in a DIMS environment. But having etched PCBs with very fine tracks on them I think I'm in with a fair chance. maybe the tip of the iceberg here, I can think of a multitude of things I can fabricate using an etch technique.....
I thinking to myself as i was making more trolley ears that there must be an easier way..... the it dawned on me! Why not etch them out of .25mm brass sheet??? Well when I get my etching thingy sorted I'll have ago at it.
One picture shows the way I've been maiking them with wire and bead soldered up....
The other is my home grown art work shown 5 times full size they will in reality be 8mm wide and 12mm wide for the double. The bit that is used is the black bit and Ive tried to keep the amount of brass to be etched away to a minimum....
The "blade" that the wire is soldered to has a slit in it that mates with a slit on the hanger, to assemble a suitable bead is placed on the bit that sticks up and the other is turned 90 degrees and slid down a dot of lead free solder paste and a touch with an iron and the job is done!!!!
This is a single item only if I can do one then I'll make up a slab of the singles and do a 6x4" sheet of them...... I may have to tweak the design......
Yes I know I can buy these in the US but the postage is absurd and they are lost wax castings with no insulator on them and the little insulator "males" them. The BIG question is though whether such fine work can be etched in a DIMS environment. But having etched PCBs with very fine tracks on them I think I'm in with a fair chance. maybe the tip of the iceberg here, I can think of a multitude of things I can fabricate using an etch technique.....
Now all I need is the positive resist and I'm away......
